Surely nanaej, if children were going to use the staff room as a teaching space then all that would be needed is for the staff who read the newspapers you disapproved of to be asked to put the newspapers out of sight, and if they didn't then to remove them yourself and dispose of them. I would hope that the teachers shared your commitment to keeping children safe and would happily comply with the request to put the papers out of sight.
If a publication is legal then I am uncomfortable at the thought that someone would ban it as this would be imposing their views on other people.
FlicketyB says she would not buy anything published by Murdoch - obviously that is her right but lets take it a step further. She goes to her employer and demands any Murdoch publication be banned from her workplace because she finds it offensive. Her employer, not willing to stand up to a strong willed woman, agrees. Let's then say that she belongs to a club - she goes to the committee running the club and demands that any Murdoch publication be banned from the club premises. The committee, only doing the job in their spare time and not wanting to waste any time on it, agree. So there we have perfectly legal publications banned from two places because one person dislikes them (sorry FlicketyB I'm sure you are not that intolerant - just using it as an example).
Now this may seem like an extreme scenario but once we start allowing people to ban legal publications they personally disapprove of, there is no knowing where it will end.